Cermet Group 4 Leader : Matthew Lu Members : Rafael De Jesus Alexander Go Tian Karl Ong Robert ng.

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Presentation transcript:

Cermet Group 4 Leader : Matthew Lu Members : Rafael De Jesus Alexander Go Tian Karl Ong Robert ng

What is a cermet ? -A material consisting of processed ceramic particles bonded with metal and used in high- strength and high-temperature applications. Also called ceramal.

What is it made of ? -A cermet is a composite material composed of ceramic (cer) and metallic (met) materials. -A cermet is ideally designed to have the optimal properties of both a ceramic, such as high temperature resistance and hardness, and those of a metal, such as the ability to undergo plastic deformation.

-The metal is used as a binder for an oxide, boride, or carbide. Generally, the metallic elements used are nickel, molybdenum, and cobalt. -Depending on the physical structure of the material, cermets can also be metal matrix composites, but cermets are usually less than 20% metal by volume.

Applications of cermets -Cermets were first used extensively in ceramic-to-metal joint applications. -Construction of vacuum tubes was one of the first critical systems, with the electronics industry employing and developing such seals. -German scientists recognized that vacuum tubes with improved performance and reliability could be produced by substituting ceramics for glass.

-Ceramic tubes can be outgassed at higher temperatures. Because of the high- temperature seal, ceramic tubes withstand higher temperatures than glass tubes.

Cermet -Ceramic tubes are also mechanically stronger and less sensitive to thermal shock than glass tubes. Today, cermet vacuum tube coatings have proved to be key to solar hot water systems

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